13 Jun
2013
13 Jun
'13
3:47 a.m.
My Macintosh 128/512k gets an airing on YouTube this time.
http://youtu.be/dTdnB9QcD1w
I learnt a lot about these early macs filming this. I also discovered a
surprise inside. A "Mac Rescue" daughterboard
(see
http://www.vintage-computer.com/vcforum/showthread.php?37732-Amazing-what-y…
)
Terry (Tez)
13 Jun
13 Jun
7:47 a.m.
Heh! I used to repair those things... and I hated those stupid
expansion boards... all they ever did was break stuff...
On 13 June 2013 08:47, Terry Stewart <terry at webweavers.co.nz> wrote:
My Macintosh 128/512k gets an airing on YouTube this
time.
http://youtu.be/dTdnB9QcD1w
I learnt a lot about these early macs filming this. I also discovered a
surprise inside. A "Mac Rescue" daughterboard
(see
http://www.vintage-computer.com/vcforum/showthread.php?37732-Amazing-what-y…
)
Terry (Tez)
--
Yoyodyne Propulsion Systems: "The Future Begins Tomorrow"
Visit us at: http://www.yoyodyne-propulsion.net
--------
"Gregor Samsa awoke one morning to discover that he had been
transformed into a giant cockroach." Nah, it's too good.
--Max Bialystock
8:58 a.m.
Tez, may you post the photo of the "Mac Rescue" board in a public place?
:oD
Congratulations for the nice piece :o) I remembered just now I gotta fix
a 128 board I have stored somewhere in my home :o)
---
Enviado do meu Motorola PT550
Meu site: http://www.tabalabs.com.br
----- Original Message -----
From: "Terry Stewart" <terry at webweavers.co.nz>
To: <cctalk at classiccmp.org>
Sent: Thursday, June 13, 2013 4:47 AM
Subject: My Apple Macintosh 128k/512k on YouTube
My Macintosh 128/512k gets an airing on YouTube this
time.
http://youtu.be/dTdnB9QcD1w
I learnt a lot about these early macs filming this. I also discovered a
surprise inside. A "Mac Rescue" daughterboard
(see
http://www.vintage-computer.com/vcforum/showthread.php?37732-Amazing-what-y…
)
Terry (Tez)
10:15 a.m.
Hmm...you'll find it here?
https://plus.google.com/photos/114533377966161346914/albums/588896779948508…
Terry (Tez)
On Fri, Jun 14, 2013 at 12:58 AM, Alexandre Souza <
alexandre.tabajara at gmail.com> wrote:
Tez, may you post the photo of the "Mac Rescue" board in a public
place? :oD
Congratulations for the nice piece :o) I remembered just now I gotta
fix a 128 board I have stored somewhere in my home :o)
---
Enviado do meu Motorola PT550
Meu site: http://www.tabalabs.com.br
----- Original Message ----- From: "Terry Stewart" <terry at
webweavers.co.nz
To: <cctalk at classiccmp.org>
Sent: Thursday, June 13, 2013 4:47 AM
Subject: My Apple Macintosh 128k/512k on YouTube
My Macintosh 128/512k gets an airing on YouTube this time.
http://youtu.be/dTdnB9QcD1w
I learnt a lot about these early macs filming this. I also discovered a
surprise inside. A "Mac Rescue" daughterboard
(see
http://www.vintage-computer.**com/vcforum/showthread.php?**
37732-Amazing-what-you-find-**in-your-128k-Mac-The-Mac-**
Rescue-Expansion-Board<http://www.vintage-computer.com/vcforum/showthrea…
)
Terry (Tez)
11 a.m.
<borat mode ON>
Niiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiceeeeee!
<boart mode OFF>
Seems easy to reproduce... ;o)
Thanks, Terry!
11:47 a.m.
On Thu, Jun 13, 2013 at 11:00 AM, Alexandre Souza
<alexandre.tabajara at gmail.com> wrote:
Interesting. I have a Mac 512K with a Dove Snap board (that my mother
purchased new to extend the life of her first machine), but I've never
see _that_ add on.
Seems easy to reproduce... ;o)
Yes. Much simpler than the Dove Snap to install, and more
importantly, _de_install.
It is, presumably, some buffers, an addressing PAL or two, and the
obviously visible SIMM sockets and NCR 5380 chip.
-ethan
12:06 p.m.
On Jun 13, 2013, at 11:47 AM, Ethan Dicks <ethan.dicks at gmail.com> wrote:
It is, presumably, some buffers, an addressing PAL or
two, and the
obviously visible SIMM sockets and NCR 5380 chip.
And the unmistakable gargantuan footprint of a 68000. What is
that one? A faster one, or a 68010? I don't see a clock
crystal anywhere on that board, so a faster one wouldn't make
a lot of sense.
- Dave
12:29 p.m.
On Thu, Jun 13, 2013 at 12:06 PM, David Riley <fraveydank at gmail.com> wrote:
On Jun 13, 2013, at 11:47 AM, Ethan Dicks
<ethan.dicks at gmail.com> wrote:
I don't think you could easily accelerate an original Mac, and I agree
there is no crystal there. You _could_ install a 68010 (presuming there
are no MOVEcc instructions to trip it up, as there are in, for example,
AmigaDOS 1.1) but AFAIK, it's just there to make room on the
mainboard to plug in the expansion board (much like an IDE
interface product for the Amiga whose name escapes me).
-ethan
It is, presumably, some buffers, an addressing
PAL or two, and the
obviously visible SIMM sockets and NCR 5380 chip.
And the unmistakable gargantuan footprint of a 68000. What is
that one? A faster one, or a 68010? I don't see a clock
crystal anywhere on that board, so a faster one wouldn't make
a lot of sense.
1:33 p.m.
On Jun 13, 2013, at 12:29 PM, Ethan Dicks <ethan.dicks at gmail.com> wrote:
On Thu, Jun 13, 2013 at 12:06 PM, David Riley
<fraveydank at gmail.com> wrote:
It would not be easy to accelerate without some really weird
bus synchronization logic, though since the RAM is built into
the daughterboard, it would be easier than otherwise. The
68010 also has a different stack frame format for some
exceptions (notably bus error), which might require some ROM
modifications; I don't know if you'd need ROM modifications
to support the SCSI chip (you certainly would at boot; you'd
probably need Plus ROMs at the very least).
Side topic: I recently got a 128k/512k logic board off eBay
with the RAM array desoldered (definitely desoldered,
not just never installed). Does anyone know if there's any
special reason for that (e.g. one of these daughterboards),
or is it more likely that someone just used it as a RAM
donor? Once I get the time (and an analog board, or work up
some substitute for one), I'll see if there's anything else
broken on board; I think I have substitutes for every chip
on there except the HALs, and I can make subs for those with
GALs).
- Dave
On Jun 13, 2013, at 11:47 AM, Ethan Dicks
<ethan.dicks at gmail.com> wrote:
I don't think you could easily accelerate an original Mac, and I agree
there is no crystal there. You _could_ install a 68010 (presuming there
are no MOVEcc instructions to trip it up, as there are in, for example,
AmigaDOS 1.1) but AFAIK, it's just there to make room on the
mainboard to plug in the expansion board (much like an IDE
interface product for the Amiga whose name escapes me). It is, presumably, some buffers, an addressing
PAL or two, and the
obviously visible SIMM sockets and NCR 5380 chip.
And the unmistakable gargantuan footprint of a 68000. What is
that one? A faster one, or a 68010? I don't see a clock
crystal anywhere on that board, so a faster one wouldn't make
a lot of sense. 
1:40 p.m.
Ethan Dicks wrote:
I don't think you could easily accelerate an
original Mac, and I agree
there is no crystal there.
It would be complicated with an add-on board (perhaps with a cache?),
but I did make the original Mac 23% faster than the Classic by replacing
the PALs.
http://www.merlintec.com/lsi/mac512.html
-- Jecel
10:50 a.m.
Good on ya, Terry. Another well done video.
On Thu, Jun 13, 2013 at 2:47 AM, Terry Stewart <terry at webweavers.co.nz>wrote:
My Macintosh 128/512k gets an airing on YouTube this
time.
http://youtu.be/dTdnB9QcD1w
I learnt a lot about these early macs filming this. I also discovered a
surprise inside. A "Mac Rescue" daughterboard
(see
http://www.vintage-computer.com/vcforum/showthread.php?37732-Amazing-what-y…
)
Terry (Tez)
4129
days inactive
4129
days old
10 comments
7 participants
participants (7)
-
alexandre.tabajara＠gmail.com -
ethan.dicks＠gmail.com -
fraveydank＠gmail.com -
jecel＠merlintec.com -
john＠yoyodyne-propulsion.net -
oltmansg＠gmail.com -
terry＠webweavers.co.nz